mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-24 20:19:44 +00:00
e6a71ae327
(Function 1), by Carlo Marcelo Arenas Belon. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2353 c046a42c-6fe2-441c-8c8c-71466251a162
385 lines
11 KiB
C
385 lines
11 KiB
C
/*
|
|
* QEMU i440FX/PIIX3 PCI Bridge Emulation
|
|
*
|
|
* Copyright (c) 2006 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "vl.h"
|
|
typedef uint32_t pci_addr_t;
|
|
#include "pci_host.h"
|
|
|
|
typedef PCIHostState I440FXState;
|
|
|
|
static void i440fx_addr_writel(void* opaque, uint32_t addr, uint32_t val)
|
|
{
|
|
I440FXState *s = opaque;
|
|
s->config_reg = val;
|
|
}
|
|
|
|
static uint32_t i440fx_addr_readl(void* opaque, uint32_t addr)
|
|
{
|
|
I440FXState *s = opaque;
|
|
return s->config_reg;
|
|
}
|
|
|
|
static void piix3_set_irq(void *pic, int irq_num, int level);
|
|
|
|
/* return the global irq number corresponding to a given device irq
|
|
pin. We could also use the bus number to have a more precise
|
|
mapping. */
|
|
static int pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
|
|
{
|
|
int slot_addend;
|
|
slot_addend = (pci_dev->devfn >> 3) - 1;
|
|
return (irq_num + slot_addend) & 3;
|
|
}
|
|
|
|
static uint32_t isa_page_descs[384 / 4];
|
|
static uint8_t smm_enabled;
|
|
|
|
static void update_pam(PCIDevice *d, uint32_t start, uint32_t end, int r)
|
|
{
|
|
uint32_t addr;
|
|
|
|
// printf("ISA mapping %08x-0x%08x: %d\n", start, end, r);
|
|
switch(r) {
|
|
case 3:
|
|
/* RAM */
|
|
cpu_register_physical_memory(start, end - start,
|
|
start);
|
|
break;
|
|
case 1:
|
|
/* ROM (XXX: not quite correct) */
|
|
cpu_register_physical_memory(start, end - start,
|
|
start | IO_MEM_ROM);
|
|
break;
|
|
case 2:
|
|
case 0:
|
|
/* XXX: should distinguish read/write cases */
|
|
for(addr = start; addr < end; addr += 4096) {
|
|
cpu_register_physical_memory(addr, 4096,
|
|
isa_page_descs[(addr - 0xa0000) >> 12]);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void i440fx_update_memory_mappings(PCIDevice *d)
|
|
{
|
|
int i, r;
|
|
uint32_t smram, addr;
|
|
|
|
update_pam(d, 0xf0000, 0x100000, (d->config[0x59] >> 4) & 3);
|
|
for(i = 0; i < 12; i++) {
|
|
r = (d->config[(i >> 1) + 0x5a] >> ((i & 1) * 4)) & 3;
|
|
update_pam(d, 0xc0000 + 0x4000 * i, 0xc0000 + 0x4000 * (i + 1), r);
|
|
}
|
|
smram = d->config[0x72];
|
|
if ((smm_enabled && (smram & 0x08)) || (smram & 0x40)) {
|
|
cpu_register_physical_memory(0xa0000, 0x20000, 0xa0000);
|
|
} else {
|
|
for(addr = 0xa0000; addr < 0xc0000; addr += 4096) {
|
|
cpu_register_physical_memory(addr, 4096,
|
|
isa_page_descs[(addr - 0xa0000) >> 12]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void i440fx_set_smm(PCIDevice *d, int val)
|
|
{
|
|
val = (val != 0);
|
|
if (smm_enabled != val) {
|
|
smm_enabled = val;
|
|
i440fx_update_memory_mappings(d);
|
|
}
|
|
}
|
|
|
|
|
|
/* XXX: suppress when better memory API. We make the assumption that
|
|
no device (in particular the VGA) changes the memory mappings in
|
|
the 0xa0000-0x100000 range */
|
|
void i440fx_init_memory_mappings(PCIDevice *d)
|
|
{
|
|
int i;
|
|
for(i = 0; i < 96; i++) {
|
|
isa_page_descs[i] = cpu_get_physical_page_desc(0xa0000 + i * 0x1000);
|
|
}
|
|
}
|
|
|
|
static void i440fx_write_config(PCIDevice *d,
|
|
uint32_t address, uint32_t val, int len)
|
|
{
|
|
/* XXX: implement SMRAM.D_LOCK */
|
|
pci_default_write_config(d, address, val, len);
|
|
if ((address >= 0x59 && address <= 0x5f) || address == 0x72)
|
|
i440fx_update_memory_mappings(d);
|
|
}
|
|
|
|
static void i440fx_save(QEMUFile* f, void *opaque)
|
|
{
|
|
PCIDevice *d = opaque;
|
|
pci_device_save(d, f);
|
|
qemu_put_8s(f, &smm_enabled);
|
|
}
|
|
|
|
static int i440fx_load(QEMUFile* f, void *opaque, int version_id)
|
|
{
|
|
PCIDevice *d = opaque;
|
|
int ret;
|
|
|
|
if (version_id != 1)
|
|
return -EINVAL;
|
|
ret = pci_device_load(d, f);
|
|
if (ret < 0)
|
|
return ret;
|
|
i440fx_update_memory_mappings(d);
|
|
qemu_get_8s(f, &smm_enabled);
|
|
return 0;
|
|
}
|
|
|
|
PCIBus *i440fx_init(PCIDevice **pi440fx_state)
|
|
{
|
|
PCIBus *b;
|
|
PCIDevice *d;
|
|
I440FXState *s;
|
|
|
|
s = qemu_mallocz(sizeof(I440FXState));
|
|
b = pci_register_bus(piix3_set_irq, pci_slot_get_pirq, NULL, 0, 4);
|
|
s->bus = b;
|
|
|
|
register_ioport_write(0xcf8, 4, 4, i440fx_addr_writel, s);
|
|
register_ioport_read(0xcf8, 4, 4, i440fx_addr_readl, s);
|
|
|
|
register_ioport_write(0xcfc, 4, 1, pci_host_data_writeb, s);
|
|
register_ioport_write(0xcfc, 4, 2, pci_host_data_writew, s);
|
|
register_ioport_write(0xcfc, 4, 4, pci_host_data_writel, s);
|
|
register_ioport_read(0xcfc, 4, 1, pci_host_data_readb, s);
|
|
register_ioport_read(0xcfc, 4, 2, pci_host_data_readw, s);
|
|
register_ioport_read(0xcfc, 4, 4, pci_host_data_readl, s);
|
|
|
|
d = pci_register_device(b, "i440FX", sizeof(PCIDevice), 0,
|
|
NULL, i440fx_write_config);
|
|
|
|
d->config[0x00] = 0x86; // vendor_id
|
|
d->config[0x01] = 0x80;
|
|
d->config[0x02] = 0x37; // device_id
|
|
d->config[0x03] = 0x12;
|
|
d->config[0x08] = 0x02; // revision
|
|
d->config[0x0a] = 0x00; // class_sub = host2pci
|
|
d->config[0x0b] = 0x06; // class_base = PCI_bridge
|
|
d->config[0x0e] = 0x00; // header_type
|
|
|
|
d->config[0x72] = 0x02; /* SMRAM */
|
|
|
|
register_savevm("I440FX", 0, 1, i440fx_save, i440fx_load, d);
|
|
*pi440fx_state = d;
|
|
return b;
|
|
}
|
|
|
|
/* PIIX3 PCI to ISA bridge */
|
|
|
|
PCIDevice *piix3_dev;
|
|
PCIDevice *piix4_dev;
|
|
|
|
/* just used for simpler irq handling. */
|
|
#define PCI_IRQ_WORDS ((PCI_DEVICES_MAX + 31) / 32)
|
|
|
|
static int pci_irq_levels[4];
|
|
|
|
static void piix3_set_irq(void *pic, int irq_num, int level)
|
|
{
|
|
int i, pic_irq, pic_level;
|
|
|
|
pci_irq_levels[irq_num] = level;
|
|
|
|
/* now we change the pic irq level according to the piix irq mappings */
|
|
/* XXX: optimize */
|
|
pic_irq = piix3_dev->config[0x60 + irq_num];
|
|
if (pic_irq < 16) {
|
|
/* The pic level is the logical OR of all the PCI irqs mapped
|
|
to it */
|
|
pic_level = 0;
|
|
for (i = 0; i < 4; i++) {
|
|
if (pic_irq == piix3_dev->config[0x60 + i])
|
|
pic_level |= pci_irq_levels[i];
|
|
}
|
|
pic_set_irq(pic_irq, pic_level);
|
|
}
|
|
}
|
|
|
|
static void piix3_reset(PCIDevice *d)
|
|
{
|
|
uint8_t *pci_conf = d->config;
|
|
|
|
pci_conf[0x04] = 0x07; // master, memory and I/O
|
|
pci_conf[0x05] = 0x00;
|
|
pci_conf[0x06] = 0x00;
|
|
pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
|
|
pci_conf[0x4c] = 0x4d;
|
|
pci_conf[0x4e] = 0x03;
|
|
pci_conf[0x4f] = 0x00;
|
|
pci_conf[0x60] = 0x80;
|
|
pci_conf[0x69] = 0x02;
|
|
pci_conf[0x70] = 0x80;
|
|
pci_conf[0x76] = 0x0c;
|
|
pci_conf[0x77] = 0x0c;
|
|
pci_conf[0x78] = 0x02;
|
|
pci_conf[0x79] = 0x00;
|
|
pci_conf[0x80] = 0x00;
|
|
pci_conf[0x82] = 0x00;
|
|
pci_conf[0xa0] = 0x08;
|
|
pci_conf[0xa2] = 0x00;
|
|
pci_conf[0xa3] = 0x00;
|
|
pci_conf[0xa4] = 0x00;
|
|
pci_conf[0xa5] = 0x00;
|
|
pci_conf[0xa6] = 0x00;
|
|
pci_conf[0xa7] = 0x00;
|
|
pci_conf[0xa8] = 0x0f;
|
|
pci_conf[0xaa] = 0x00;
|
|
pci_conf[0xab] = 0x00;
|
|
pci_conf[0xac] = 0x00;
|
|
pci_conf[0xae] = 0x00;
|
|
}
|
|
|
|
static void piix4_reset(PCIDevice *d)
|
|
{
|
|
uint8_t *pci_conf = d->config;
|
|
|
|
pci_conf[0x04] = 0x07; // master, memory and I/O
|
|
pci_conf[0x05] = 0x00;
|
|
pci_conf[0x06] = 0x00;
|
|
pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
|
|
pci_conf[0x4c] = 0x4d;
|
|
pci_conf[0x4e] = 0x03;
|
|
pci_conf[0x4f] = 0x00;
|
|
pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
|
|
pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
|
|
pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
|
|
pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
|
|
pci_conf[0x69] = 0x02;
|
|
pci_conf[0x70] = 0x80;
|
|
pci_conf[0x76] = 0x0c;
|
|
pci_conf[0x77] = 0x0c;
|
|
pci_conf[0x78] = 0x02;
|
|
pci_conf[0x79] = 0x00;
|
|
pci_conf[0x80] = 0x00;
|
|
pci_conf[0x82] = 0x00;
|
|
pci_conf[0xa0] = 0x08;
|
|
pci_conf[0xa2] = 0x00;
|
|
pci_conf[0xa3] = 0x00;
|
|
pci_conf[0xa4] = 0x00;
|
|
pci_conf[0xa5] = 0x00;
|
|
pci_conf[0xa6] = 0x00;
|
|
pci_conf[0xa7] = 0x00;
|
|
pci_conf[0xa8] = 0x0f;
|
|
pci_conf[0xaa] = 0x00;
|
|
pci_conf[0xab] = 0x00;
|
|
pci_conf[0xac] = 0x00;
|
|
pci_conf[0xae] = 0x00;
|
|
}
|
|
|
|
static void piix_save(QEMUFile* f, void *opaque)
|
|
{
|
|
PCIDevice *d = opaque;
|
|
pci_device_save(d, f);
|
|
}
|
|
|
|
static int piix_load(QEMUFile* f, void *opaque, int version_id)
|
|
{
|
|
PCIDevice *d = opaque;
|
|
if (version_id != 2)
|
|
return -EINVAL;
|
|
return pci_device_load(d, f);
|
|
}
|
|
|
|
int piix_init(PCIBus *bus, int devfn)
|
|
{
|
|
PCIDevice *d;
|
|
uint8_t *pci_conf;
|
|
|
|
d = pci_register_device(bus, "PIIX", sizeof(PCIDevice),
|
|
devfn, NULL, NULL);
|
|
register_savevm("PIIX", 0, 2, piix_save, piix_load, d);
|
|
|
|
piix3_dev = d;
|
|
pci_conf = d->config;
|
|
|
|
pci_conf[0x00] = 0x86; // Intel
|
|
pci_conf[0x01] = 0x80;
|
|
pci_conf[0x02] = 0x2E; // 82371FB PIIX PCI-to-ISA bridge
|
|
pci_conf[0x03] = 0x12;
|
|
pci_conf[0x08] = 0x02; // Step A1
|
|
pci_conf[0x0a] = 0x01; // class_sub = PCI_ISA
|
|
pci_conf[0x0b] = 0x06; // class_base = PCI_bridge
|
|
pci_conf[0x0e] = 0x80; // header_type = PCI_multifunction, generic
|
|
|
|
piix3_reset(d);
|
|
return d->devfn;
|
|
}
|
|
|
|
int piix3_init(PCIBus *bus, int devfn)
|
|
{
|
|
PCIDevice *d;
|
|
uint8_t *pci_conf;
|
|
|
|
d = pci_register_device(bus, "PIIX3", sizeof(PCIDevice),
|
|
devfn, NULL, NULL);
|
|
register_savevm("PIIX3", 0, 2, piix_save, piix_load, d);
|
|
|
|
piix3_dev = d;
|
|
pci_conf = d->config;
|
|
|
|
pci_conf[0x00] = 0x86; // Intel
|
|
pci_conf[0x01] = 0x80;
|
|
pci_conf[0x02] = 0x00; // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
|
|
pci_conf[0x03] = 0x70;
|
|
pci_conf[0x0a] = 0x01; // class_sub = PCI_ISA
|
|
pci_conf[0x0b] = 0x06; // class_base = PCI_bridge
|
|
pci_conf[0x0e] = 0x80; // header_type = PCI_multifunction, generic
|
|
|
|
piix3_reset(d);
|
|
return d->devfn;
|
|
}
|
|
|
|
int piix4_init(PCIBus *bus, int devfn)
|
|
{
|
|
PCIDevice *d;
|
|
uint8_t *pci_conf;
|
|
|
|
d = pci_register_device(bus, "PIIX4", sizeof(PCIDevice),
|
|
devfn, NULL, NULL);
|
|
register_savevm("PIIX4", 0, 2, piix_save, piix_load, d);
|
|
|
|
piix4_dev = d;
|
|
pci_conf = d->config;
|
|
|
|
pci_conf[0x00] = 0x86; // Intel
|
|
pci_conf[0x01] = 0x80;
|
|
pci_conf[0x02] = 0x10; // 82371AB/EB/MB PIIX4 PCI-to-ISA bridge
|
|
pci_conf[0x03] = 0x71;
|
|
pci_conf[0x0a] = 0x01; // class_sub = PCI_ISA
|
|
pci_conf[0x0b] = 0x06; // class_base = PCI_bridge
|
|
pci_conf[0x0e] = 0x80; // header_type = PCI_multifunction, generic
|
|
|
|
piix4_reset(d);
|
|
return d->devfn;
|
|
}
|